Safety/Tolerability and Efficacy of YHD001 in Patients With Acute and Chronic Bronchitis

Study Summary

The study will conduct with 4 comparative groups orally treated with YHD001 dose level 1(t.i.d.), YHD001 dose level 2(t.i.d.), pelargonium sidoides extract 9mL(t.i.d.) or Placebo for 7 days. The treatments will be assigned randomly to patients (n=116) with acute or chronic bronchitis.